Fixed "Putting on a none would be tricky"
Build your own carts! (and fixes C::B build)

Adds option to start building vehicles with casters, so you can build
your own carts.  Also fixes C::B build, since I couldn't build this
without it.
Reinforced solar panels

Basically a solar panel with a piece of reinforced glass to protect it.
Heavy-duty kitchen unit

A kitchen unit reinforced with steel framing.
USACE repair rig

A heavy-duty, milspec version of the welding rig.
Fix spelling on Louisville Slaughterer

Just realized I spelled this wrong.  D'oh.
Remove dead "side == 3" code
Merge stuff and things; roll your own shopping cart! Enjoy body-part specific infections! Enjoy a cozy campfire in your native language! (may cause burns)
Rename "disease_level" to "disease_duration"
Fix infection transition
Make antibiotics function properly
Make "variable size" stackable

In my quest to build a functional, 1-tile vehicle, I discovered you
can't install a wheel and an engine on the same square, because they
both have "VARIABLE SIZE" flags.  I don't see why this flag shouldn't be
stackable, so I added it to the can_stack_vpart_flag list.
Merge leftovers of bodypart-specific conditions.
Printed circuit boards!
Properly add "faulty" tag to bio_stiff.
Fix being able to get water from kitchen units with 0% water in the tanks
Electronic scraps!
Fix water tanks being emptied if container filling is cancelled.
Fix various issues involving hallucinations vs. vehicles
Fix broken if statement